Commands by pfoten12 (0)

  • bash: commands not found

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remove all spaces from all files in current folder

Do some learning...
compgen -c finds everything in your path.

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Get a qrcode for a given string

Make a thumbnail image of first page of a PDF.
convert is included in ImageMagick. Don't forget the [X] (where X is the page number). [0] is the first page of the PDF.

Find the package that installed a command

See entire packet payload using tcpdump.

Give to anyone a command to immediatly find a particular part of a man.
Example : $ LC_ALL=C man less | less +/ppattern

Convert ascii string to hex
If you're going to use od, here's how to suppress the labels at the beginning. Also, it doesn't output the \x, hence the sed command at the end. Remove it for space separated hex values instead

floating point operations in shell scripts
allows you to use floating point operations in shell scripts


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